NetBSD/sys/arch/sh3/include/coff_machdep.h

/*	$NetBSD: coff_machdep.h,v 1.2 2000/01/02 13:39:51 msaitoh Exp $	*/

/*
 * Copyright (c) 1994, 1995 Scott Bartram
 * All rights reserved.
 *
 * adapted from sys/sys/exec_ecoff.h
 * based on Intel iBCS2
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. The name of the author may not be used to endorse or promote products
 *    derived from this software without specific prior written permission
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#ifndef _SH3_COFF_MACHDEP_H_
#define _SH3_COFF_MACHDEP_H_

/*
 * COFF file header
 */

struct coff_filehdr {
	u_short	f_magic;	/* magic number */
	u_short	f_nscns;	/* # of sections */
	long	f_timdat;	/* timestamp */
	long	f_symptr;	/* file offset of symbol table */
	long	f_nsyms;	/* # of symbol table entries */
	u_short	f_opthdr;	/* size of optional header */
	u_short	f_flags;	/* flags */
};

/* f_magic flags */
#define COFF_MAGIC_SH3_BIG	0x500
#define COFF_MAGIC_SH3_LITTLE	0x550

/* f_flags */
#define COFF_F_RELFLG	0x1
#define COFF_F_EXEC	0x2
#define COFF_F_LNNO	0x4
#define COFF_F_LSYMS	0x8
#define COFF_F_SWABD	0x40
#define COFF_F_AR16WR	0x80
#define COFF_F_AR32WR	0x100
#define COFF_F_AR32W	0x200

/*
 * COFF system header
 */

struct coff_aouthdr {
	short	a_magic;
	short	a_vstamp;
	long	a_tsize;
	long	a_dsize;
	long	a_bsize;
	long	a_entry;
	long	a_tstart;
	long	a_dstart;
};

/* magic */
#define COFF_OMAGIC	0444	/* text not write-protected; data seg
				   is contiguous with text */
#define COFF_NMAGIC	0410	/* text is write-protected; data starts
				   at next seg following text */
#define COFF_ZMAGIC	0000	/* text and data segs are aligned for
				   direct paging */
#define COFF_SMAGIC	0443	/* shared lib */

/*
 * COFF section header
 */

struct coff_scnhdr {
	char	s_name[8];
	long	s_paddr;
	long	s_vaddr;
	long	s_size;
	long	s_scnptr;
	long	s_relptr;
	long	s_lnnoptr;
	u_short	s_nreloc;
	u_short	s_nlnno;
	long	s_flags;
};

/* s_flags */
#define COFF_STYP_REG		0x00
#define COFF_STYP_DSECT		0x01
#define COFF_STYP_NOLOAD	0x02
#define COFF_STYP_GROUP		0x04
#define COFF_STYP_PAD		0x08
#define COFF_STYP_COPY		0x10
#define COFF_STYP_TEXT		0x20
#define COFF_STYP_DATA		0x40
#define COFF_STYP_BSS		0x80
#define COFF_STYP_INFO		0x200
#define COFF_STYP_OVER		0x400
#define COFF_STYP_SHLIB		0x800

/*
 * COFF shared library header
 */

struct coff_slhdr {
	long	entry_len;	/* in words */
	long	path_index;	/* in words */
	char	sl_name[1];
};

struct coff_exechdr {
	struct coff_filehdr f;
	struct coff_aouthdr a;
};

#define COFF_ROUND(val, by)     (((val) + by - 1) & ~(by - 1))

#define COFF_ALIGN(a) ((a) & ~(COFF_LDPGSZ - 1))

#define COFF_HDR_SIZE \
	(sizeof(struct coff_filehdr) + sizeof(struct coff_aouthdr))

#define COFF_BLOCK_ALIGN(ap, value) \
        ((ap)->a_magic == COFF_ZMAGIC ? COFF_ROUND(value, COFF_LDPGSZ) : \
         value)

#define COFF_TXTOFF(fp, ap) \
        ((ap)->a_magic == COFF_ZMAGIC ? 0 : \
         COFF_ROUND(COFF_HDR_SIZE + (fp)->f_nscns * \
		    sizeof(struct coff_scnhdr), \
		    COFF_SEGMENT_ALIGNMENT(fp, ap)))

#define COFF_DATOFF(fp, ap) \
        (COFF_BLOCK_ALIGN(ap, COFF_TXTOFF(fp, ap) + (ap)->a_tsize))

#define COFF_SEGMENT_ALIGN(fp, ap, value) \
        (COFF_ROUND(value, ((ap)->a_magic == COFF_ZMAGIC ? COFF_LDPGSZ : \
         COFF_SEGMENT_ALIGNMENT(fp, ap))))

#define COFF_LDPGSZ 4096

#define COFF_SEGMENT_ALIGNMENT(fp, ap) \
    (((fp)->f_flags & COFF_F_EXEC) == 0 ? 4 : 16)

#ifndef BYTE_ORDER
#error Define BYTE_ORDER!
#endif

#if BYTE_ORDER == BIG_ENDIAN
#define COFF_BADMAG(ex) ((ex)->f_magic != COFF_MAGIC_SH3_BIG)
#endif
#if BYTE_ORDER == LITTLE_ENDIAN
#define COFF_BADMAG(ex) ((ex)->f_magic != COFF_MAGIC_SH3_LITTLE)
#endif

#define IBCS2_HIGH_SYSCALL(n)		(((n) & 0x7f) == 0x28)
#define IBCS2_CVT_HIGH_SYSCALL(n)	(((n) >> 8) + 128)

#ifdef DEBUG_COFF
#define DPRINTF(a)      printf a;
#else
#define DPRINTF(a)
#endif

#define COFF_ES_SYMNMLEN	8
#define COFF_ES_SYMENTSZ	18

struct external_syment {
	union {
		char e_name[COFF_ES_SYMNMLEN];
		struct {
			char e_zeroes[4];
			char e_offset[4];
		} e;
	} e;
	char e_value[4];
	char e_scnum[2];
	char e_type[2];
	char e_sclass[1];
	char e_numaux[1];
};

#endif /* !_SH3_COFF_MACHDEP_H_ */